Have strange visions (11)
I believe the answer is:
hallucinate
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">have strange visions</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for hallucinate that I've seen before include "Have strange visions" , "See things that aren't there" , "Experience unreal things" , "See what isn't there" .)